Date published:
Today, 17 September 2026, the SEM Committee publishes its Decision approving the SEM Testing Tariff rates that will apply to Generator Units Under Test (GUUT) from 1 January 2027.
The SEMC has decided to make no changes to the 2027 SEM Testing Tariff rates from the approved 2026 SEM Testing Tariff rates, other than to apply inflation.
The review of the Testing Tariffs methodology remains ongoing and the TSOs continue to engage with the Regulatory Authorities on its progress. This may result in further changes to the methodology from 2027 onwards.
Please direct any queries to Rayanne McGrath, rmcgrath@cru.ie, in the CRU.